Dust collecting device



Oct. 10, 1933. 5 KELLEY DUST COLLECTING DEVICE Filed Aug. 25. 1952 3 Sheets-Sheet l a al/47 9 /n,flfll rllfl IN V EN TOR. 4m e fi'lley.

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Oct. 10, 1933. G. s. KELLEY 9 1,930,099

DUST COLLECTING DEVICE Filed Aug. 25. 1932 3 Sheets-Sheet 2 INVENTOR. G

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DUST COLLECTING DEVICE Filed Aug. 25. 1952 5 Sheets-Sheet 3 P H f 5i g i 1 5/ I FIZZ. 6 -7 ://R

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HIS ATTORNEY Patented Oct. 10, 1933 George S. Kelley, Mount Vernon, N. Y., as-

signor to Kelley-Atwell Development Corporation, New York, N. Y., a corporation of New York Application August 25, 1932. Serial No. 530,341

4 Claims. (01. 255-50) This invention relates to dust collecting devices, but more particularly to apparatus of this character adapted for use in connection with rock drills of the stoper type which are supported only 5 at their extremities.

One object of the invention is to assure the correct operative relationship between the rock drill and the dust collecting device.

Another object is to enable the device to be expeditiously moved into and positively held in the correct relationship with respect to the source of dust.

Other objects will be in part obvious andgin part pointed out hereinafter.

In the accompanying drawings illustrating the invention and in which similar reference characters refer to similar parts,

Figure 1 is an elevation partly in section of .a dust collecting device constructed inaccordance with the practice of the invention and, showing it applied to a rock drill of the stoper type of which portions are also broken away,

Figure 2 is a transverse view through Figurel on the line 22, a p

Figure 3 is a sectional elevation of the collecting hood taken through Figure 2 on the line 3-3,

Figure 4 is a transverse view taken through Figure 1 on the line 44, s

Figure 5 is an elevation, partly broken away, of a. modified form of the invention,

Figure 6 is a transverse view taken through Figure5on theline 6-6,

Figure 7 is a perspective view of a detail,

Figure 8 is a sectional elevationof a modified form of the invention, and a Figure 9 is a transverse view through Figure 8 taken on the line 9-9. I a v Y Referring more particularly to the drawings and at first to the form of the inventioniillustrated in Figures 1 to 4 inclusive, A designates in general a dust collecting device and B a rock drill" to which it is applied. The rock drill B is illustrated as being of the stoper type comprising a percussive, element C and a feedingelement D whereby the percussive element is actuated or lifted in the direction ofthe work, such as the rock E, in accordance with the degree of penetration of the drill steel Fthereinto. The drill steel F may, as is customary, extend into the percussive element C to receive the blows of a hammer piston (not shown) but whereby it is driven into the rock E.

The feeding element D of the rock drill comprises the usual feeding cylinder G which may be secured to the percussive element in any suit- 1 able manner and accommodates a piston H having a rod J which extends through the lower end of the cylinder G and carries at its lower end a foot piece or pointer K which is arranged in coaxial relationship withsthe drill steel F to engage an abutment, as for instance a rock surface L.

The admission of pressure fluid into the cylinderG for actuating it and thepercussive element with respect to the piston H may be controlled in any wellknown manner, as for instance by a valve 0 interposed in a pressure fluid suppy line P, and the valve 0 may, as illustrated, also serve to effect the exhaust of pressure fluid from the cylinder G.

In the drawings the percussive element B is shown only in outline but it is to be understood that the rock drill maybe either equipped with automatic rotation'mechanism for effecting rota-- tion of the drill steel F or the rock drill may be bodily rotated by the operator to shift the cutting bit of the drill'steel between blows of the hammer piston The dust collecting device A comprises a cylinder Q which is arranged adjacent the rock drill and in parallelismwith respect thereto. Within the cylinder Q isa piston R having a rod S which extends slidably through the front or upper end of the cylinder Q. On the free end of the rod connected to the yoke ,T by meansv of bolts V which may serve as pivots for the hood so that the hood may, swing freelyrelatively to the yoke irregular surface.

Preferably the hood U consists of rubber or Tand thus be capable of adjusting itself upon an like flexible material and has an inlet opening W at its front end through which the cuttings may pass from the hole being drilled into a chamber X in the hood U. At the opposite end of the hood .Uis an aperture Y to accommodate the drill steel F which extends therethrough, andadjacent the apertureY is a hollow extension Z the interior of which serves as an outlet opening for the chamber X and through which the dust passes into a conduit b leading to a suitable evacuating deand the lower end ofthe rod *cJis afllxed to a bracket d clamped to the lower end of the piston rod J and preferably adjacent the pointer K. On the feeding cylinder G and the percussiveelement B of the rock drill are guides e which are clamped to the percussive element of the cylinder G. Within the guides e are a plurality of rollers ,1 having concave surfaces g which correspond to the curvature of the surfaceof the cylinder Q against which they bear. As a preferred form of construction four rollers f are disposed in each guide e and are mounted on shafts h seated with their ends in the guide members e.

Any suitable means may be provided for controlling the admission and exhaust of pressure fluid to and from the cylinder Q. The means selected for purposes of illustration consists of a two-way valve 1 arranged in a pressure fluid supply line It. In one of its positions the valve admits pressure fluid into the cylinder Q and in another position cuts oil communication between the supply line and the cylinder and places the cylinder Q in communication with the atmosphere.

In the operation of the apparatus and with the dust collecting device attached to the rock drill in the manner described pressure fluid is admitted into the cylinders G and Q'by means of the valves 0 and 7', respectively. Pressure fluid admitted into the cylinder G raises the drilling mechanism to press the cutting bit of the drill steel F against the rock surface E, and the pressure fluid admitted into the cylinder Q raises the piston R and presses the end of the hood U against the rock E.

During the operation of the drill the dust created by the drill steel may be drawn through the chamber X and the conduit b and thus removed from the vicinity of the operation. The interior of the cylinder Q may be retained in full communication with a source of pressure fluid supply during the drilling operation and such pressure fluid will, by acting, against the piston it, serve to retain the inlet end W of the hood and the cylinder Q will, therefore, be guided at,

a plurality of spaced points along its length. Moreover, by attaching the dust collecting device tothe rock drill in the manner described the rock drill may be bodily rotated ,andjthe dust collecting device will follow the movement of the Another distinct advantage of-the present invention is that, due to the arrangement described, the dust collecting device will always becon'veniently in the desired position'and does not require the loss of additional timeto effect the correct setting thereof. with respectto the work. Being attached to the drilling apparatus it will at all times be in the correct position with respect thereto and also with respect to the work.

In the form of the I invention illustrated in Figures 5 to '1 inclusive, the cylinder Q is shown secured directly to the percussive element of the rock drill by a clamp 0 carried by the cylinder Q. The clamp o, in the present instance, is secured to bearing members p by bolts 1;. The bearing members p are preferably permanently secured to the cylinder q, as by welding, and have bearing surfaces 1' which lie on opposite sides of the clamp o and seat against the surface of the percussive element C.

On the free end of the piston rod S are a plurality of laterally extending arms s having upturned portions t which are suitably spaced to form a cage for the reception of the hood U:

A closure is provided for the lower end of the cylinder Q in the form of a head u having a series of slots 11 for the reception of bolts 10 mounted pivotally on the cylinder. The bolts w are provided with the usual nuts z for clamping the head, it securely to the cylinder Q.

In addition to its function as a closure for the end of the cylinder Q the head u also acts as a valve chest having a valve chamber 1; for the reception of a throttle valve 2 which is illustrated as being of the rotary type; The valve 2 is shown as being provided with a central chamber 2 into which pressure fluid may be constantly introduced from a source of supply. "In the wall of the throttle valve .is a port 3 which, in one position, communicates with a port 4 opening into the lower end of the cylinder Q and in another position registers with a pipe 5 which leads to the upper end of the cylinder Q.

In the periphery of the throttle valve 2 is a groove 6 which affords communication between an exhaust port 7 in the valve chest and either the port 4 or the pipe 5 for exhausting pressure fluid from the ends of the cylinder Q. q

The mode of operation of this form of the invention is thought to be obvious. As in the modi- 1 flcation previously described the feeding element of the rock drill and the extensible element of the dust collecting device are independently controlled. In the present instance, howevenwhenever it is desired to press the hood U against the 115 rock surface E pressure fluid is admitted through the port 4 into the lower end of the cylinder Q, and in the position which the throttle valve 2 then assumes the upper end of the cylinder Q will be placed in communication with the atmosphere through the groove 6 and the exhaust port '7.

\ Whenever it is desired to retract the hood U the throttle valve z is turned to its other limiting position. The port 3 will then register with the pipe 125 5 to admit pressure fluid into the upper end of the cylinder Q and the lower end of the cylinder will be open to the atmosphere through the port 4, the groove 6 and the exhaust port 7.

' In the modification illustrated in Figures 8 and 130 9 the dust collecting device is adapted to be disposed with one end against the work and carries at its other end a pointer 8 which seats upon the rock surface L whereby the rock drill is supported. The pointer 8 may be threaded directly into a head 9 which formsa closure for the cylinder Q.

In this form of the invention'the upper or free end of the piston rod S is in the form of a tapered portion 10 which extends into a correspondingly elements, such as the rod 8 and the hood U may be raised or lowered by pressure fluid a head 16, which forms a closure for the upper end or the cylinder, is provided with a valve chamber 17 to accommodate a throttle valve 18. The valve 18 is bored to form a chamber 19 into which pressure fluid may be constantly introduced from a source of supply.

In the wall of the throttle valve 18 is a port 20 adapted to register with a port 21 in the wall of the cylinder Q and opening into the upper end of the cylinder. In another position 01 the throttle valve the port 20 communicates with a pipe 22 which is connected to the lower end of the cylinder Q. The throttle valve 18 is, moreover, provided with a peripheral groove 23 which afiords communication between an exhaust port 24 in the head 16 and the port 21 and the pipe 22.

The operation of this form of invention, briefly described, is as follows: In one position of the throttle valve pressure fluid flows through the port 20 and the pipe 22 into the lower end of the cylinder Q to press the hood U against the work and in this position the opposite end of the cylinder Q is open to the atmosphere through the ports 21 and 24 and the groove 23. In a reverse posit on of the throttle valve the groove 23 will establish communication between the pipe 22 and the exhaust port 24, and the port 20 will then register with the port 21 to admit pressure fluid into the upper end of the cylinder Q for retracting the hood U from the work.

I claim:

l. A dust collecting device, comprising a hood having a chamber and openings at the ends thereof, a cylinder, a piston in the cylinder connected to the hood, means for admitting pressure fluid into the cylinder to actuate the piston and thereby press the hood over a source of dust, a conduit for conveying dust from the chamber, and a foot piece on the cylinder arranged coaxially with the hood to support the collecting device.

2. A dust collecting device, comprising pressure fluid actuated extensible means, a hood carried by the extensible means seated over a source oi dust to support one end of the extensible means and having inlet and exhaust openings for dust, a foot piece to support the other. end of the extensiblemeans and being coaxial with the hood, and means for controlling the admission and exhaust of pressure fluid into and from the extensible means.

3. The combination with a rock drill adapted to rotate bodily about its axis, of an extensible means on the rock drill and rotatable therewith, a dust collecting hood on the extensible means, means for'admitting pressure fluid into the ex-= tensible means to press the hood over a source of dust, a foot piece for the rock drill arranged coaxially with the hood, and means on the extensible means connected to the foot piece to support the extensible means.

4. The combination with a rock drill adapted to rotate about its axis, of a fluid actuated extensible means supported by the reel: drill and being rotatable therewith, a dust collecting hood on the extensible means and being ofi-set with respect thereto to lie in the longitudinal plane of the rock drill, a conduit for conveying dust from the hood, and means for admitting pressure fluid into the extensible means to press the hood over a source of dust.

GEORGE Khhhh'f. 

